So let's say you take a 440 with decent heads, cam, and carb and fuel delivery and put a 200 shot on it to get to 700 HP, everyone would probably agree that is doable.

But could you take something more anemic with a tiny cam and restricted heads like a bone stock 318 with 230 HP, upgrade the fuel system and throw a 200 shot at it to get 430 HP?

There's got to be some point where it doesn't work right? Where is that point? I mean you can't put a 200 shot on a 3 HP Briggs and Stratton motor and get 203 HP right?

What does the baseline motor have to be for the 200 shot to more or less actually equal close to 200 extra horsepower when given a 200 HP shot.

Maybe this is what the OP was asking?